Journal of Microbiology and Biotechnology

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Assessment of Neuronal Cell-Based Cytotoxicity of Neurotoxins from an Estuarine Nemertean in the Han River Estuary

  • Kwon, Yeo Seon (Department of Biological Engineering, Inha University) ;
  • Min, Seul Ki (Department of Biological Engineering, Inha University) ;
  • Yeon, Seung Ju (Department of Biological Engineering, Inha University) ;
  • Hwang, Jin ha (Department of Biological Engineering, Inha University) ;
  • Hong, Jae-Sang (Department of Oceanography, Inha University) ;
  • Shin, Hwa Sung (Department of Biological Engineering, Inha University)
  • Received : 2016.11.08
  • Accepted : 2017.01.11
  • Published : 2017.04.28
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Abstract

A heteronemertean, Yininemertes pratensis, was collected in Han River Estuary, South Korea. This estuarine nemertean has been known by the local fishermen for harmful effects to the glass eels, juveniles of Japanese eel Anguilla japonica, migrating to fresh water. The present study confirmed the neurotoxic effects of this heteronemertean ribbon worm at the cellular level. Derivative types of neurotoxic tetrodotoxin (TTX), 5,11-dideoxy TTX (m/z 288) and 11-norTTX-6(S)-01 (m/z 305.97), were identified through HPLC and MALDI-TOF MS. However, significant neurotoxicity was confirmed in the fraction containing an undefined molecule corresponding to the 291.1 (m/z) peak, when tested in rat primary astrocytes and dorsal ganglion cells. This study is the first to report neurotoxins of the estuarine nemertean, fairly abundant in the Han River estuary, and suggests the long-term monitoring of population dynamics and surveillance of the toxicity in this river estuary.

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References

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